What is the reason they call it as "open" watcom?
'Open'Watcom' page about says that in the first half of 2002, the source was
finally made available under the Sybase Open Watcom Public License, version
1.0.
The FSF mentions Open Watcom on
https://www.gnu.org/philosophy/open-source-misses-the-point.en.html under the
Practical Differences between Free Software and Open Source paragraph as For
example, “Open Watcom” is nonfree because its license does not allow
making a modified version and using it privately. Fortunately, few programs
use such licenses.
But as you mentioned vita_cell Oracle VM is Licensed under GPLV2 (guest
additions too) this leads to confusion.
https://www.virtualbox.org/wiki/Licensing_FAQ
Assuming Open Watcom compiles non-free librairies , thus opening the door to
a malware binary(ies) as an executable program code which could contain
data, instructions for malicious malware program to run in your OS.
It would be helpull insight if those librairies, licenses could be cleary
identified and pinpointed
http://perforce.openwatcom.org:4000/@md=d&cd=//depot/&c=1eZ@//depot/openwatcom/?ac=83
There is a fork, but what is the significant difference(s) with Original ?
https://github.com/open-watcom/open-watcom-v2